.article_list.ng-enter,
.article_list.ng-leave,
.article_list.ng-move {
    -webkit-transition: 0.5s linear all;
    -moz-transition: 0.5s linear all;
    -o-transition: 0.5s linear all;
    transition: 0.5s linear all;
}

.article_list.ng-enter,
.article_list.ng-move {
    opacity: 0;
    height: 0;
    overflow: hidden;
}

.article_list.ng-move.ng-move-active,
.article_list.ng-enter.ng-enter-active {
    opacity: 1;
    height: 66px;
}

.article_list.ng-leave {
    opacity: 1;
    overflow: hidden;
}

.article_list.ng-leave.ng-leave-active {
    opacity: 0;
    height: 0;
    padding-top: 0;
    padding-bottom: 0;
}